Please help with both questions thank you!

Answer:

They can travel through matter, but not in a vacuum.

Explanation:

The best statement that describes the transmission of mechanical waves is that they can travel through matter but not in a vacuum.

Mechanical waves require a material medium for their propagation. In the absence of such medium they are not transmitted. Examples are seismic waves, sound waves, water waves e.t.c

A type of wave than can be transmitted through a vacuum and through matter are the electromagnetic waves.

Answer:

it is option B. they are correct

Answer:

Characteristics that can be inherited is hair color or muscle structure.

Answer:

21.25 m/s

Explanation:

The speed of the pitch is equal to the distance the baseball travels (85 m) divided by the time it took for it to cover that distance (4). In short, we are dividing 85 by 4 to reach our answer of 21.25 meters per second.

Answer:

The correct option is;

Why car engines are not perfectly efficient

Explanation:

The Second Law of Thermodynamics states that the total entropy, S, of a system combined with the entropy of its surrounding cannot be decreased, such that for an irreversible process, the entropy always increases and [tex]S_f[/tex] > [tex]S_i[/tex], while for a reversible process the entropy is constant and [tex]S_f = S_i[/tex]

The entropy is a measure of the amount of useful work obtainable from heat (or thermal) energy

A system with a low entropy has high amounts of heat energy capable of doing work while a high entropy system can produce only a small amount of useful work from the available thermal energy

In car engines, as the parts start to move, the entropy of the system increases alongside the generated heat lost to the environment, the amount of heat available for doing work reduces and therefore, the entropy increases further and the ratio of work obtainable from a given input of heat energy reduces and therefore, the car engine is not perfectly efficient.

Answer: b. infrared

Explanation:

The visible light with the smaller frequency is associated with the color red.

While the blue is the one with the larger frequency.

Now, as the name says, infrared waves are the ones with a frequency just below the one of the red visible light.

Where the frequency of the red light is something around (4.3*10^14 Hz)

and the frequency of the infrared waves is in the range between (10^12 Hz and 10^14 Hz)

Then the correct option is b, infrared.

Answer:

because the earth is more consistent and while you use a slinky your hand moving it is not very controlled

Answer:

El volumen final del globo es 193.75 L.

Explanation:

La ley de Boyle establece que “El volumen ocupado por una determinada masa gaseosa a temperatura constante, es inversamente proporcional a la presión”

La ley de Boyle se expresa matemáticamente como:  P*V=k  donde k es una constante.

En esta ley entonces se relacionan dos variables: presión y volumen, por lo que se asume que la temperatura del gas y el número de moléculas del gas son contantes.

Ahora es posible suponer que tienes un cierto volumen de gas V1 que se encuentra a una presión P1 al comienzo del experimento. Si varias el volumen de gas hasta un nuevo valor V2, entonces la presión cambiará a P2, y se cumplirá:

P1*V1=P2*V2

En este caso:

Reemplazando:

1 atm* 155 L=0.8 atm*V2

y  resolviendo se obtiene:

[tex]V2=\frac{1 atm*155 L}{0.8 atm}[/tex]

V2= 193.75 L

El volumen final del globo es 193.75 L.

Answer: $0.343/liter

Explanation: $1.29/gallon x 1 gallon/3.78541 liters = $0.343/liter

Answer:

a. 100.0 kg

Explanation:

Given parameters:

Mass  = 100kg

Force of gravity  = 2.5m/s²

Unknown:

mass on Jupiter  = ?

Solution:

The mass of a substance is the quantity of matter such body possess. Mass is the same.

So, the mass of earth and on Jupiter is the same.

Only the weight of the object will differ since weight is contingent on the force of gravity from places to places.

My mass on Jupiter will still be 100kg

Answer:

all of above I think sorry if I'm not right but I tried

Answer:  d

Explanation:

Answer:

1

Explanation:

How many digits are in front of the decimal in scientific notation?

Answer:

B Other guy said D and it was wrong but the correct answer is B have a good day

Explanation:

Magnetic and electric fields form a right angle with each other along the

path of a moving electromagnetic wave.

The oscillations between an electric field and a magnetic field produce waves known as electromagnetic waves, or EM waves. In other words, magnetic and electric fields oscillate to form electromagnetic (EM) waves.

When an electric field interacts with a magnetic field, electromagnetic waves are created. Therefore, they are referred to as "electromagnetic" waves. An electromagnetic wave's electric field and magnetic field are perpendicular to one another (at right angles). Additionally, they are perpendicular to the EM wave's direction.

In vacuum, EM waves move at a fixed speed of 3.00 x 10⁸ m/s. Neither the magnetic field nor the electric field can deflect them. They can, however, exhibit diffraction or interference.

In electromagnetic wave the magnetic and electric fields form a right angle with each other  along the path of a moving electromagnetic wave.

Learn more about electromagnetic waves here:

https://brainly.com/question/17057080

#SPJ5

Answer:

[tex]22.4\:\mathrm{kg\cdot m/s}[/tex]

Explanation:

Momentum is given by [tex]p=mv[/tex].

Let [tex]p_1[/tex] be the initial momentum of the object:

[tex]p_1=m\cdot v=22.4[/tex]

If we doubled the mass, the new mass would be [tex]2\cdot m[/tex], and if we halved the velocity, the new velocity would be [tex]\frac{1}{2}\cdot v[/tex].

Therefore, the final momentum would be:

[tex]p_f=2\cdot m\cdot \frac{1}{2}\cdot v=m\cdot v=\fbox{$22.4\:\mathrm{kg\cdot m/s}$}[/tex]..

Answer:

22.4

Explanation:

Acellus

Answer:

A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.

Explanation:

hope this helped

Explanation:

KE = 0.5mv² = 0.5(50kg)(8.97m/s)² = 2,009.5J.

PE = mgh = (50kg)(9.81N/kg)(1m) = 490.5J.

You can see that the total mechanical energy (ME) is the sum

Answer:

True

its giving an object that has potential energy, kinetic energy.

Explanation:

Answer:

Concept: Periodic Trends

Answer:

D

Explanation:

plz help me with my most recent post if u can

Answer:

40kg

Explanation:

that the answer

Answer:

The initial momentum of the bowling ball is 20 kgm/s.

Explanation:

Given;

mass of the bowling ball, m₁ = 5.0 kg

initial velocity of the bowling ball, u₁ = 4.0 m/s

mass of the Frodo, m₂ = 60 kg

initial velocity of Frodo, u₂ = 0

The initial momentum of the bowling ball is calculated as;

P = m₁u₁

P = 5 x 4

P = 20 kgm/s

Therefore, the initial momentum of the bowling ball is 20 kgm/s.

Answer:

a)Acceleration increases proportionally

b)If you increase the mass at a given force the rate of acceleration slows.

Answer: this answer is definitely c for k12

Explanation:

Answer:

The mass of the apple is 0.172 kg (172 g)

Explanation:

The Law Of Conservation Of Linear Momentum

The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and speed v is  

P=mv.  

If we have a system of two bodies, then the total momentum is the sum of both momentums:

[tex]P=m_1v_1+m_2v_2[/tex]

If a collision occurs and the velocities change to v', the final momentum is:

[tex]P'=m_1v'_1+m_2v'_2[/tex]

Since the total momentum is conserved, then:

P = P'

Or, equivalently:

[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2[/tex]

If both masses stick together after the collision at a common speed v', then:

[tex]m_1v_1+m_2v_2=(m_1+m_2)v'[/tex]

We are given the mass of an arrow m1=43 g = 0.043 kg traveling at v1=84 m/s to the right (positive direction). It strikes an apple of unknown mass m2 originally at rest (v2=0). The common speed after they collide is v'=16.8 m/s.

We need to solve the last equation for m2:

[tex]m_2v_2-m_2v'=m_1v'-m_1v_1[/tex]

Factoring m2 and m1:

[tex]m_2(v_2-v')=m_1(v'-v_1)[/tex]

Solving:

[tex]\displaystyle m_2=\frac{m_1(v'-v_1)}{v_2-v'}[/tex]

Substituting:

[tex]\displaystyle m_2=\frac{0.043(16.8-84)}{0-16.8}[/tex]

[tex]\displaystyle m_2=\frac{-2.8896}{-16.8}[/tex]

[tex]\displaystyle m_2=0.172\ kg[/tex]

The mass of the apple is 0.172 kg (172 g)

Answer:

A. a motor

Explanation:

A motor is an electrical device or machine that converts electrical energy into mechanical energy. That is, a motor takes electrical energy to produce motion. There are different types of motors such as DC motor, induction motor and so on.

When electrical current flows through a coil, a magnetic flux is been produced, therefore when a rotating power source is supplied to coil of a motor, a magnetic field is produced which causes torque.

Answer:

A: Motor.

Explanation:

It’ll be a motor because motors use rotating electric power sources to produce magnetic fields.

Strategies currently being implemented include:

Vapor recovery nozzles at the gasoline pumps to reduce refueling emissions;

Cleaner burning gasoline reformulated to reduce VOC, NOx and other pollutants;

Strict NOx emission limits for power plants and industrial combustion sources;

Enhanced vehicle inspection programs in states; and

Strict limitations on the solvent usage in factories.

hope this helps

Answer:

1. no

2. it would be different because of gravity.

3. no

4. they would be different because of the unit of measurment used. Mexico and any other country would use the metric system.